If you have done BDS in indiaHow can you pursue DDS degree in America?

What are the options in US for study/practice for someone who has
done BDS in India and is practicing as a dentist in her own clinic
in India? The visa type would be H4.

As I vaguely understand, US does not accept Indian medical degrees
and person has to get a degree again in US -- is that a bachelors
or a masters degree ?? Also how difficult is it to get into dental
school? Are there any financial aid - TA/RA type stuff there too?
Does it involve .. like other medical schools here.. 48 hr type
rotations as well??

Also, are there any other related fields that someone with BDS can
leverage.. something like clinical research or some other degree --
maybe one cannot practice as a dentist -- but in same field where
previous knowledge can be leveraged.